// makeNiceTitles
// http://www.kryogenix.org/code/browser/nicetitle/
var XHTMLNS = "http://www.w3.org/1999/xhtml";
var CURRENT_NICE_TITLE;
addEvent(window, "load", makeNiceTitles);
function makeNiceTitles() {
	if (!document.createElement || !document.getElementsByTagName) return;
	// add namespace methods to HTML DOM; this makes the script work in both HTML and XML contexts.
	if(!document.createElementNS) {
		document.createElementNS = function(ns,elt) {
			return document.createElement(elt);
		}
	}
	if(!document.links) {
		document.links = document.getElementsByTagName("a");
	}
	for (var ti=0;ti<document.links.length;ti++) {
		var lnk = document.links[ti];
		if (lnk.title) {
			lnk.setAttribute("nicetitle",lnk.title);
			lnk.removeAttribute("title");
			addEvent(lnk,"mouseover",showNiceTitle);
			addEvent(lnk,"mouseout",hideNiceTitle);
			addEvent(lnk,"focus",showNiceTitle);
			addEvent(lnk,"blur",hideNiceTitle);
		}
	}
	var instags = document.getElementsByTagName("ins");
	if (instags) {
		for (ti=0;ti<instags.length;ti++) {
			var instag = instags[ti];
			if (instag.dateTime) {
				var strDate = instag.dateTime;
				var dtIns = new Date(strDate.substring(0,4),parseInt(strDate.substring(4,6)-1),strDate.substring(6,8),strDate.substring(9,11),strDate.substring(11,13),strDate.substring(13,15));
				instag.setAttribute("nicetitle","Added on "+dtIns.toString());
				addEvent(instag,"mouseover",showNiceTitle);
				addEvent(instag,"mouseout",hideNiceTitle);
				addEvent(instag,"focus",showNiceTitle);
				addEvent(instag,"blur",hideNiceTitle);
			}
		}
	}
}

function findPosition( oLink ) {
	if( oLink.offsetParent ) {
		for( var posX = 0, posY = 0; oLink.offsetParent; oLink = oLink.offsetParent ) {
			posX += oLink.offsetLeft;
			posY += oLink.offsetTop;
		}
		return [ posX, posY ];
	} else {
		return [ oLink.x, oLink.y ];
	}
}

function showNiceTitle(e) {
	if (CURRENT_NICE_TITLE) hideNiceTitle(CURRENT_NICE_TITLE);
	if (!document.getElementsByTagName) return;
	if (window.event && window.event.srcElement) {
		lnk = window.event.srcElement
	} else if (e && e.target) {
		lnk = e.target
	}
	if (!lnk) return;
	if (lnk.nodeType == 1 || lnk.nodeType == 3) {
		// lnk is a textnode -- ascend parents until we hit a link
		lnk = getParent(lnk,"A");
	}
	if (!lnk) return;
	nicetitle = lnk.getAttribute("nicetitle");
	
	var d = document.createElementNS(XHTMLNS,"div");
	d.className = "nicetitle";
	tnt = document.createTextNode(nicetitle);
	pat = document.createElementNS(XHTMLNS,"p");
	pat.className = "titletext";
	pat.appendChild(tnt);
	d.appendChild(pat);
	if (lnk.href) {
		tnd = document.createTextNode(lnk.href);
		pad = document.createElementNS(XHTMLNS,"p");
		pad.className = "destination";
		pad.appendChild(tnd);
		d.appendChild(pad);
	}
	
	STD_WIDTH = 300;
	if (lnk.href) {
		h = lnk.href.length;
	} else { h = nicetitle.length; }
	if (nicetitle.length) {
		t = nicetitle.length;
	}
	h_pixels = h*6; t_pixels = t*10;
	
	if (h_pixels > STD_WIDTH) {
		w = h_pixels;
	} else if ((STD_WIDTH>t_pixels) && (t_pixels>h_pixels)) {
		w = t_pixels;
	} else if ((STD_WIDTH>t_pixels) && (h_pixels>t_pixels)) {
		w = h_pixels;
	} else {
		w = STD_WIDTH;
	}
		
	d.style.width = w + 'px';	

	mpos = findPosition(lnk);
	mx = mpos[0];
	my = mpos[1];
	
	d.style.left = (mx+15) + 'px';
	d.style.top = (my+35) + 'px';
	if (window.innerWidth && ((mx+w) > window.innerWidth)) {
		d.style.left = (window.innerWidth - w - 25) + "px";
	}
	if (document.body.scrollWidth && ((mx+w) > document.body.scrollWidth)) {
		d.style.left = (document.body.scrollWidth - w - 25) + "px";
	}
	
	document.getElementsByTagName("body")[0].appendChild(d);
	
	CURRENT_NICE_TITLE = d;
}

function hideNiceTitle(e) {
	if (!document.getElementsByTagName) return;
	if (typeof(CURRENT_NICE_TITLE) != "undefined") {
		document.getElementsByTagName("body")[0].removeChild(CURRENT_NICE_TITLE);
		CURRENT_NICE_TITLE = null;
	}
}

// Add an eventListener to browsers that can do it somehow.
// Originally by the amazing Scott Andrew.
function addEvent(obj, evType, fn){
	if (obj.addEventListener){
		obj.addEventListener(evType, fn, true);
		return true;
	} else if (obj.attachEvent){
		var r = obj.attachEvent("on"+evType, fn);
		return r;
	} else {
		return false;
	}
}

function getParent(el, pTagName) {
	if (el == null) return null;
	else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase()) // Gecko bug, supposed to be uppercase
		return el;
	else
		return getParent(el.parentNode, pTagName);
}

function getMousePosition(event) {
	if (is.IE) {
		x = window.event.clientX + document.documentElement.scrollLeft + document.body.scrollLeft;
		y = window.event.clientY + document.documentElement.scrollTop	+ document.body.scrollTop;
	}
	if (is.NS) {
		x = event.clientX + window.scrollX;
		y = event.clientY + window.scrollY;
	}
	return [x,y];
}